| 摘要 |
1,185,242. Graft polymers. TEE-PAK Inc. 23 June, 1967, No. 29011/67. Heading C3G. A polymer of at least gelatinous solidity is treated with a first material to fix said material within the polymer by ion exchange, treated with a second material which forms a coordination complex with said first material and provides at least part of a catalyst for effecting polymerization of an olefinic monomer and then treated with said monomer and anything additional required to render the second material catalytically active, whereby said monomer is polymerized within the last polymer. The first material is preferably a salt of a polyvalent metal, copper, silver or gold. In preferred embodiments, a metal cation introduced into the last polymer is complexed with, e.g. hydrazine or ammonia to form the reducing component of a redox catalyst, the oxidizing component being added subsequently to effect the polymerization or, alternatively, the oxidizing component, e.g. H 2 O 2 is complexed with the metal cation and the reducing component is added separately. In the examples, cotton linters or wood pulp are treated with a salt of Cd, Fe (ferrous or ferric), A1, Cu, Ni, Co or Ag, the metal ions are complexed with hydrazine and/or ammonia and the resulting fibres or pulp are grafted in an aqueous slurry containing H 2 O 2 with methyl, ethyl, isobutyl or lauryl methacrylate; styrene; acrylonitrile; vinyl acetate; acrylamide; acrolein or ethyl acrylate. In Examples 87 and 88, wood pulp is treated with an aluminium salt, and the ions introduced are complexed with H 2 O 2 prior to grafting of the pulp in an aqueous slurry with methyl methacrylate or styrene in the presence of hydrazine. Other embodiments disclosed include polyethylene films having polymethyl methacrylate deposited on their surface, wood containing a deposited polymer derived from pentachlorophenyl acrylate, cellulose films modified by deposition of a basic polymer followed by dyeing with an acid dye and vice versa. |
